<template>
    <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>编辑商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card >
        <el-alert show-icon title="添加商品信息" type="info" :closable="false" center></el-alert>
        <el-steps :active="activeIndex - 0" finish-status="success" simple>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
        </el-steps>
        <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px" label-position="top">
            <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeTabLeave" @tab-click="tabClicked">
                <el-tab-pane label="基本信息" name="0">
                    <el-form-item label="商品名称" prop="goods_name">
                        <el-input v-model="editForm.goods_name"></el-input>
                    </el-form-item>
                    <el-form-item label="商品价格" prop="goods_price">
                        <el-input v-model="editForm.goods_price"></el-input>
                    </el-form-item>
                    <el-form-item label="商品重量" prop="goods_weight">
                        <el-input v-model="editForm.goods_weight"></el-input>
                    </el-form-item>
                    <el-form-item label="商品数量" prop="goods_number">
                        <el-input v-model="editForm.goods_number"></el-input>
                    </el-form-item>
                    <el-form-item prop="goods_cat">
                        <el-cascader v-model="editForm.goods_cat" :options="catelist" :props="cateProps" @change="handleChange" clearable>
                        </el-cascader>
                    </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品参数" name="1">
                    <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
                        <el-checkbox-group v-model="item.attr_vals">
                            <el-checkbox :label="cb" v-for="(cb, i) in item.attr_vals" :key="i"  border></el-checkbox>
                        </el-checkbox-group>
                    </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品属性" name="2">
                    <el-form-item v-for="item in onlyTableData" :key="item.attr_id" :label="item.attr_name">
                        <el-input v-model="item.attr_vals"></el-input>
                    </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品图片" name="3">
                    <el-upload :action="uploadURL" :on-preview="handlePreview" :on-remove="handleRemove" list-type="picture" :headers="headersObj" :on-success="handleSuccess" :file-list="fileList">
                    <el-button size="small" type="primary">点击上传</el-button>
                    </el-upload>
                </el-tab-pane>
                <el-tab-pane label="商品内容" name="4">
                    <!-- 富文本编辑器 -->
                    <quill-editor v-model="editForm.goods_introduce">
                    </quill-editor>
                    <el-button type="primary" class="btnEdit" @click="edit">添加商品</el-button>
                </el-tab-pane>
            </el-tabs>
        </el-form>
    </el-card>
    <!-- 图片预览 -->
    <el-dialog
    title="图片预览"
    :visible.sync="previewDialogVisible"
    width="50%">
    <img :src="previewPath" alt="" class="previewImg">
    </el-dialog>
    </div>
</template>

<script>
import _ from 'lodash'
export default {
  data() {
    return {
      activeIndex: '0',
      editForm: {
        goods_name: '',
        goods_price: '',
        goods_weight: '',
        goods_number: '',
        // 商品所属的分类数组
        goods_cat: [],
        // 图片数组
        pics: [],
        goods_introduce: '',
        attrs: []
      },
      editFormRules: {
        goods_name: [
          { required: true, message: '请输入新的商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入新的商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入新的商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入新的商品数量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请输入新的商品数量', trigger: 'blur' }
        ]
      },
      catelist: [],
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children',
        expandTrigger: 'hover'
      },
      manyTableData: [],
      onlyTableData: [],
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      headersObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      previewPath: '',
      previewDialogVisible: false,
      fileList: []
    }
  },
  created() {
    this.fetchData(this.$route.params.id)
    this.getCateList()
  },
  methods: {
    async fetchData(id) {
      const { data: res } = await this.$http.get('goods/' + id)
      // console.log(res)
      this.editForm = res.data
      // console.log(this.editForm.goods_cat)
      this.editForm.goods_cat = this.editForm.goods_cat.split(',')
      this.fileList = this.editForm.pics
      console.log(this.fileList)
      // console.log(this.editForm.goods_cat)
    },
    // 获取所有商品分类数据
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) return this.$message.error('获取商品分类数据失败')
      this.catelist = res.data
      // console.log(this.catelist)
    },
    // 级联选择器选中项变化，触发函数
    handleChange() {
      // console.log(this.editForm.goods_cat)
      if (this.editForm.goods_cat.length !== 3) {
        this.editForm.goods_cat = []
        return false
      }
    },
    beforeTabLeave(activeName, oldActiveName) {
      if (oldActiveName === '0' && this.editForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类！')
        return false
      }
    },
    async tabClicked() {
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: 'many' } })
        if (res.meta.status !== 200) return this.$message.error('获取动态参数列表失败！')
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableData = res.data
        // console.log(this.manyTableData)
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: 'only' } })
        if (res.meta.status !== 200) return this.$message.error('获取静态属性列表失败！')
        this.onlyTableData = res.data
        // console.log(this.onlyTableData)
      }
    },
    // 处理图片预览效果
    handlePreview(file) {
      this.previewPath = file.response.data.url
      this.previewDialogVisible = true
    },
    // 处理移除图片操作
    handleRemove(file) {
      // console.log(file)
      const filePath = file.response.data.tmp_path
      const i = this.editForm.pics.findIndex(x => x.pic === filePath)
      this.editForm.pics.splice(i, 1)
    },
    // 监听图片上传成功事件
    handleSuccess(response) {
      // console.log(response)
      const picInfo = { pic: response.data.tmp_path }
      this.editForm.pics.push(picInfo)
      console.log(this.editForm.pics)
    },
    edit() {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return this.$message.error('请填写必要的表单项！')
        // 执行添加 lodash cloneDeep(obj)
        const form = _.cloneDeep(this.editForm)
        form.goods_cat = form.goods_cat.join(',')
        // 处理动态参数
        this.manyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.editForm.attrs.push(newInfo)
        })
        // 处理静态属性
        this.onlyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.editForm.attrs.push(newInfo)
        })
        form.attrs = this.editForm.attrs
        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) return this.$message.error('添加商品失败')
        this.$message.success('添加商品成功')
        this.$router.push('/goods')
      })
    }
  },
  computed: {
    cateId() {
      if (this.editForm.goods_cat.length === 3) {
        return this.editForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style lang="less" scoped>
.el-checkbox {
    margin: 0 10px 0 0 !important;
}
.previewImg {
  width: 100%;
}
.btnEdit {
  margin-top: 15px;
}
</style>
